<!doctype html>
<html lang="zh">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bootstrap 练习</title>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet"
    integrity="sha384-KK94CHFLLe+nY2dmCWGMq91rCGa5gtU4mk92HdvYe+M/SXH301p5ILy+dN9+nJOZ" crossorigin="anonymous">
  <style>
    .row div {
      border: 1px red dashed;
      margin: 2em 0;
    }

  </style>
</head>

<body>
  <div class="container">
    <h1>Hello, world!</h1>
    <div class="row">
      <div class="col">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col">网格系统-栅格3</div>
      <div class="col">网格系统-栅格4</div>
      <div class="col">网格系统-栅格5</div>
      <div class="col">网格系统-栅格6</div>
      <div class="col">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col">网格系统-栅格3</div>
      <div class="col">网格系统-栅格4</div>
      <div class="col">网格系统-栅格5</div>
      <div class="col">网格系统-栅格6</div>
    </div>
    <div class="row">
      <div class="col">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col">网格系统-栅格3</div>
      <div class="col">网格系统-栅格4</div>
      <div class="col">网格系统-栅格5</div>
      <div class="col">网格系统-栅格6</div>

    </div>
    <div class="row">
      <div class="col">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col">网格系统-栅格3</div>
      <div class="col">网格系统-栅格4</div>

    </div>
    <div class="row">
      <div class="col">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col">网格系统-栅格3</div>

    </div>
    <div class="row">
      <div class="col-3">网格系统-栅格1</div>
      <div class="col">网格系统-栅格2</div>
      <div class="col-3">网格系统-栅格3</div>

    </div>
    <div class="row">
      <div class="col-sm-2 ">网格系统-栅格1</div>
      <div class="col-md-2">网格系统-栅格2</div>
      <div class="col-sm-2">网格系统-栅格3</div>

    </div>
    <h2>栅格嵌套</h2>
    <div class="row">
      <div class="col-sm-7">
        <div class="row">
          <div class="col"><img
              src="https://www.xbmu.edu.cn/__local/F/B6/9C/80CF2BC52D66D957DFC05FBA9C7_CC49A074_3FCF9.jpg" alt=""
              class="img-fluid"></div>
          <div class="col"><img
              src="https://www.xbmu.edu.cn/__local/F/B6/9C/80CF2BC52D66D957DFC05FBA9C7_CC49A074_3FCF9.jpg" alt=""
              class="img-fluid"></div>
        </div>
      </div>
      <div class="col-sm-5"><img class="img-fluid"
          src="https://www.xbmu.edu.cn/__local/2/33/84/66A9C50610A87805958D726E4FE_8DD50635_46F09.jpg" alt=""></div>
    </div>
  </div>

</body>

</html>
